"Peter Smithson" <[log in to unmask]> wrote in message
news:MPG.1b7aeb536d54f8379897dc@News.Individual.NET...
> Hello,
>
> I'm trying to see how the VPLUS processing spec command CDIGIT
works.
> There's nice worked examples in the VPLUS manual for numbers but it
says
> it can work on letters.  From the manual
>
> "Letters of the alphabet can be checked by either a modulus 10 or 11
> check. Digits are assigned to the letters so they can be treated
like
> numbers. Thus a field with a check digit can contain a mix of
numbers
> and letters, but must not contain any special characters. Any
initial
> plus or minus sign is ignored."
>
> It doesn't say what values are assigned for the letters so I'm not
sure
> how you'd generate a check digit for "ABC" for example.
>
> I've tried searching the google groups.  Did you know, CDIGIT is not
> mentioned once on comp.sys.hp.mpe?  Obviously an obscure one.
>
> Cheers
>
> Peter
>
In my manual it's on page D-4.

Regards

--
Mark Undrill
Affirm Limited

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